<template lang="html">
  <div class="shopcart">
    <div class="content" @click="toggleList">
      <div class="content-left">
        <div class="logo-wrapper" >
          <div class="logo" :class="{'highlight': totalCount>0}">
            <span class="icon-shopping_cart" :class="{'highlight': totalCount>0}"></span>
          </div>
          <div class="num" v-show="totalCount>0">
            {{totalCount}}
          </div>
        </div>
        <div class="price" :class="{'highlight': totalCount>0}">￥{{totalPrice}}</div>
        <div class="desc">另需配送费{{deliveryPrice}}元</div>
      </div>
      <div class="content-right" :class="{'enough':payClass}" @click.stop.prevent="pay">
        {{payDesc}}
      </div>
    </div>
    <div class="ball-container">
      <div class="ball" v-for="ball in balls" v-show="ball.show">

      </div>
    </div>
    <transition name="fold">
      <div class="shopcart-list" v-show="listShow">
        <div class="list-header">
          <h1 class="title">购物车</h1>
          <span class="empty" @click="empty">清空</span>
        </div>
        <div class="list-content" ref="listContent">
          <ul>
            <li class="food" v-for="food in selectFoods">
              <span class="name">{{food.name}}</span>
              <div class="price">
                <span>￥{{food.price*food.count}}</span>
              </div>
              <div class="cartcontrol-wrapper">
                <cartcontrol :food="food"></cartcontrol>
              </div>
            </li>
          </ul>
        </div>
      </div>
    </transition>
    <transition name="fade">
      <div class="list-mask" v-show="listShow" @click="hideList"></div>
    </transition>
  </div>


</template>

<script>
import cartcontrol from '../cartcontrol/cartcontrol'
import BScroll from 'better-scroll'

export default {
  data(){
    return {
      balls:[{
        show:false
      },{
        show:false
      },{
        show:false
      },{
        show:false
      },{
        show:false
      }],
      fold: true,

    }
  },
  props:{
    selectFoods:{
      type: Array,
      default(){
        return [];
      }
    },
    deliveryPrice:{
      type:Number,
      default:0
    },
    minPrice:{
      type:Number,
      default:0
    }
  },
  computed:{
    totalPrice(){
      let total = 0;
      this.selectFoods.forEach((food) => {
        total += food.price * food.count;
      });
      return total;
    },
    payClass() {
        return this.minPrice&&!(this.totalPrice<this.minPrice);
    },
    totalCount(){
      let count = 0;
      this.selectFoods.forEach((food) => {
        count += food.count;
      });
      return count;
    },
    payDesc(){
      if (this.totalPrice === 0) {
        return `￥${this.minPrice}起送`
      }else if(this.totalPrice<this.minPrice){
        let diff = this.minPrice - this.totalPrice;
        return `还差￥${diff}元起送`
      }else{
        return '去结算';
      }
    },
    listShow(){
      if (!this.totalCount) {
        this.fold = true;
        return false;
      }
      let show = !this.fold;
      if (show) {
        this.$nextTick(() => {
          if (!this.scroll) {
            this.scroll = new BScroll(this.$refs.listContent,{
              click:true
            });
          }else {
            this.scroll.refresh();
          }

        });
      }
      return show;
    }
  },
  methods:{
    toggleList(){
      if(!this.totalCount){
        return;
      }
      this.fold = !this.fold;
    },
    empty(){
      this.selectFoods.forEach((food) => {
        food.count = 0;
      });
    },
    hideList(){
      this.fold = true;
    },
    pay(){
      if (this.totalPrice<this.minPrice) {
        return;
      }
      window.alert();

    }
  },
  created(){
    //this.payClassFun();
  },
  components:{
    cartcontrol
  }
}
</script>

<style lang="less">
.shopcart{
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 50;
  width: 100%;
  height: 48px;
  background-color: #000;
  .content{
    display: flex;
    flex-wrap: nowrap;
    background-color: #141d27;
    font-size: 0;
    .content-left{
      flex: 1;
      flex-wrap: nowrap;
      .logo-wrapper{
        display: inline-block;
        position: relative;
        top: -10px;
        margin: 0 12px;
        padding: 6px;
        width: 56px;
        height: 56px;
        box-sizing: border-box;
        border-radius: 50%;
        background-color: #141d27;
        .logo{
          width: 100%;
          height: 100%;
          border-radius: 50%;
          background-color: #2b343c;
          text-align: center;
          &.highlight{
            background-color: rgb(0,160,220);

          }
          .icon-shopping_cart{
            font-size: 24px;
            line-height: 44px;
            color: #80858a;
            &.highlight{
                color: #fff;
            }
          }
        }
        .num{
          position: absolute;
          top: 0;
          right: 0;
          width: 24px;
          height: 16px;
          line-height: 16px;
          text-align: center;
          border-radius: 16px;
          font-size: 9px;
          font-weight: 700;
          color: #fff;
          background-color: rgb(240,20,20);
          box-shadow: 0 4px 8px 0 rgba(0,0,0,0.4);
        }
      }
      .price{
        display: inline-block;
        vertical-align: top;
        line-height: 24px;
        box-sizing: border-box;
        margin-top: 12px;
        padding-right: 12px;
        border-right: 1px solid rgba(255,255,255,0.1);
        font-size: 16px;
        font-weight: 700;
        color: rgba(255, 255, 255, 0.4);
        &.highlight{
          color: #fff;
        }
      }
      .desc{
        display: inline-block;
        vertical-align: top;
        line-height: 24px;
        margin: 12px 0 0 12px;
        font-size: 12px;
        color: rgba(255, 255, 255, 0.4);
      }
    }
    .content-right{
      flex:0 0 105px;
      font-size: 12px;
      font-weight: 700;
      background-color: #2b333b;
      color: rgba(255,255,255,0.4);
      text-align: center;
      line-height: 48px;
      background-color: #2b333b;
      // &.not-enough{
      //   background-color: #2b333b;
      // }
      &.enough{
        background-color: #00b43c;
        color: #fff;
      }
    }
  }
  .shopcart-list{
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    width: 100%;
    transition: all 0.5s;
    transform: translate3d(0,-100%,0);
    &.fold-leave,&.fold-enter-active{
      transform: translate3d(0,-100%,0);

    }
    &.fold-enter,&.fold-leave-active{
      transform: translate3d(0,0,0);

    }
    .list-header{
      height: 40px;
      line-height: 40px;
      padding: 0 18px;
      background: #f3f5f7;
      border-bottom: 1px solid rgba(7,17,27,0.1);
      .title{
        float: left;
        font-size: 14px;
        color: rgb(7,17,27);
      }
      .empty{
        float: right;
        font-size: 12px;
        color: rgb(0,160,220);
      }
    }
    .list-content{
      padding: 0 18px;
      max-height: 217px;
      background: #fff;
      overflow: hidden;
      .food{
        position: relative;
        padding: 12px 0;
        box-sizing: border-box;
        border-bottom: 1px solid rgba(7, 17, 27, 0.1);
        .name{
          line-height: 24px;
          font-size: 14px;
          color: rgb(7,17,27);
        }
        .price{
          position: absolute;
          right: 90px;
          bottom: 12px;
          line-height: 24px;
          font-size: 14px;
          font-weight: 700;
          color: rgb(240,20,20);
        }
        .cartcontrol-wrapper{
          position: absolute;
          right: 0;
          bottom: 6px;
        }
      }
    }
  }
  .list-mask{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -10;
    opacity: 1;
    background: rgba(7,17,27,0.6);
    backdrop-filter:blur(10px);
    transition: all 0.4s;
    &.fade-leave,&.fade-enter-active{
      opacity: 1;
      background: rgba(7,17,27,0.6);

    }
    &.fade-enter,&.fade-leave-active{
      opacity: 0;
      background: rgba(7,17,27,0);
    }
  }
}

</style>
